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Finding the Fourth Proportional to 1,995.91, 2,750.56 and 1,435.39

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Solution

The fourth proportional to 1,995.91, 2,750.56 and 1,435.39 is: 1,978.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,995.91 : 2,750.56 = 1,435.39 : x
  2. Step 2: Convert to fraction form
    1,995.91/2,750.56 = 1,435.39/x
  3. Step 3: Cross multiply
    1,995.91x = 2,750.56 × 1,435.39
  4. Step 4: Simplify right side
    1,995.91x = 3,948,115.85
  5. Step 5: Solve for x
    x = 3,948,115.85/1,995.91
  6. Step 6: Final answer
    x = 1,978.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.